Protected metal article.



H. H. ROBERTSON. PROTECTED METALABTICLE. v APPLICATION FILED JUNE 3. |916.

Patented Sept. 3,1918.

rran STATES PATENT OFFER f HAROLD H. ROBERTSON, OF SETICIKLEY,` PENNSYLVANIA, ASSIGrNOR T0 ASBESTOS PROTECTED METAL COMPANY, 0F PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

PROTECTED METAL ARTICLE.

Specification of Lettersiatent.

Application med June 3, 191e. serial No.' 101,634.

and a resident of Sewickley, in the countyl of Allegheny and State of Pennsylvania, have invented-an Improvement in Protected Metal Articles, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a protected metal article. The protected article when in the A form of a layer or sheet is especially adapted among other cuses to be employed as a roofing o'rusiding material in the construction "of buildings, and the invention has for its ob- 4 ject to provide a superior article for this purpose, which is capable of withstanding for a substantially long time, the action of fumes, gases and climatic changes.

The metal article, such as an iron or steel sheety is provided on its sides and edges with a primary protective coating of plastic or iiuid adhesive material, which may. be asphalt having a relatively high melting point, which in turn is protected from extraneous inliuences by means of layers of fibrous material, -such as asbestoes paper orfelt and the like,which latter is saturated with plastic or iuid adhesive material, which may be asphalt having a relatively low melting point, which unites with the primary pro-- tective coating, and said metal sheet and its protective coatings will befurther protected by providing the saturated fibrous layers with a layer of fluid or plastic hydrocarbonaceous material of substantial thickness or body in which the protected metal sheet is' incased, and which serves asa sealing layer for the volatile constituents ofthe saturating inaterial for the fibrous layer and which is 'preferably asphalt of relatively high melting point mixed or tempered with v other materials and capable of uniting with the saturating material, as will be described. The particular features of this invention `will be pointed out `in the claims at the endv of this specification. n Figure l is a plan view with parts broken away of a protected metal sheet embodying this invention.

'.Fig. 2, a section on the line 2-2, Fig'.V `1.,

yindividual protected metal sheets.

Fig, a section of (a modiiied form of pro- Patented sept. 3,1918. l

The metal sheet a coated with the protective asphalt layer b, is further protected by layers c of fibrous material, such as asbestos paper or felt or the like, which are saturated with fluid or plastic material, preferably asphalt having a relatively low melting point and substantially thin and .iiuid, so that it can penetrate readily into the fibrous sheets or layers. This saturating material,- marked d in Fig. l, may be a straight asphalt having a relatively low melting point, such as 110 F., or a combination of hard or high melting point asphalt with an asphalt flux in suitable proportions to give'an asphalthaving a relatively low melting point.

The asbestos or felt sheet or layer c is saturated with the relatively low melting point asphalt before it is aflixed to the metal sheet having the coating b of asphalt of relatively N high melting point, and said coated metal sheet may be fed between the layers c of saturated fabric while the asphalt on the metal sheet is in a plastic or fluid condition-,-

after the manner represented in U. S. Patent No. 1,002,303, dated September 5, 1911, or in an other suitable or4 desired manner.

` he coated metal 'sheet with the protective layers of saturated fabric may be allowed to cool and are preferably cut up iito he sheets thus produced afford protection for the metal sheet against the action of the weather and gases or fumes a certain length of time, but inasmuch as the asphalt of the relatively lowmelting point with which thet'ains more or less volatile constituents, in

vasbestos or other fabric is saturated, con-l order to impart to it the property of readily penetrating into the asbestos or other fab` rated fibrous layer is provided with a facing or surface coating e of a material which is substantially non-adhesive at ordinary tem- A peratures but is rendered adhesive by heatand which may be asphalt of a relatively high melting point, and which -coating forms a continuous layer of substantial thickness or body in which the protected metal-sheet is incased and sealed. The sealing layer e may and preferably will have admixed with it a sufficient quantity of inert material, such as pigments, to withstand reasonable wear and tear and which sets into a dense layer, which resists abra- The\surface coating serves to seal the volatile constituents of the saturating material and thereby retains this material"in effective condition for protectingthe underlying or primary coating, and further being of substantial thickness aiords protection for the fibrous layers against mechanical abrasion, consequently insuring long life to the protected metal sheet.

The sealing coating c being a body or layer of substantial thickness and of a plastic nature also serves as a bonding coating for' uniting overlapping sheets and for sealing the joint between the overlapping ends yof the sheets, as represented in Fig. 4, by pressure applied to the external sheet. This feature 'is especiallyv useful when the eX- l ternal surfaces of the overlapping sheets form the external surface of a building.

A suitablefacing coating may be formed by incorporating gilsonite or other `asphalt of relatively high melting point with cotton seed pitch. This surface coating e may be applied in any suitable manner, as, for

55 instance, by passing the metal sheet with nthe fibrous layers adhering thereto through a bath of the surface coating material, or by rolls "or other mechanical means, or it may be by hand. Y In practice, the protected metal sheet above described, may be produced in the following manner.

The metal lsheet is cleaned in any suitable manner, such. as' no'w commonly practised,

l and is preferably heated and passed through being of a material or composition which is rendered fluid'v and therefore adhesive by heat, is capable of being set orhardened substantially in an instant by lowering the temperature of the coating or envelop, which may be accomplished by applying cold or cool water to the coated metal article, and furthermore the latter is capable of being corrugated, benty or otherwise manipulated immediately after the coating has been set, without danger of breaking or destroying the seal for the metal article.

, It will thus be seen that a superior product is obtained in that the metal article is protected from corrosion and other deleterious influences by the underlying or pri-p' y maryprotective coating, and the latter is maintained in its desired or effective condition by the asbestos layers which are saturated with the secondary protective material, and the latter is maintained in its effective condition by the sealing or third protective coating, in which latter the asbestos protected metal sheet is incased or hermetically sealed. l

It may be'preferred to use the materials herein specified as the protective coatings, but it is not desired to limit the invention in this respect. In some instances, it may be desirable to apply the surface coating to the saturated fibrous layers before the latter are united with the coated metal sheet, and therefore itis not desired to limit the invention to the specific method of preparing the sheet recited herein.

It will also be observed, that a multiple sealing of the surfaces and the edges of the tective coating, the saturating material, and by the incasing surface coating, with the result that a more durable and superior prod-v uct is obtained.

In Figs 1 and 2, I have represented one construction of protected metal sheet in which the fibrous layers c meet at the edges of the metal sheet and are cemented together by the asphalt between them, whereas in Figs. 3 and 4, the fibrous layers a overlap -metal sheet is obtained by the primary proeach other on the upper and lower surfaces of the metal sheet and are cemented together'by the asphalt with which they are saturated, and while it may be preferred.

` tective.

"hydrocarbonaceous material of metal article and fibrous layers are incased and Of such composition as to be substanvtially non-adhesive at ordinary tempera- `tures but which is rende-red adhesive by heat to enable it to bond with the saturant of the fibrous layers and temperature of said coating. n

y Q 'An improved article of manufacture, comprising a metal article provided withl a primary coating of asphalt having al relatively high melting point, layers f asbestos fabric saturated with low melting point and united with the said primary coating, and a surface coating of asphalt of relatively high melting point on to be set or hardenedv substantially in an instant by lowering theV asphalt of a relatively the external surfaces of said saturated asbestos layers and united therewith.

3. An improved article of manufacture, comprising a metal article provided with a primary coating of fluid or plastic adhesive material, non-metallic material afliXed to the surfaces of said metal article by said protective coating, and weather-resisting flexible sealing envelop of substantial thickness or body in which the protectedmetal article is incased `and of such composition as to be substantially nonadhesive at ordinary temperatures but which is rendered adhesive by heat and of a hydrocarbonaceous beinget or hardened substantially in an instant by lowering the temperature of the :composition after it has beenapplied to the metal article.

4. A n improved article of manufacture comprising primary coating of fluid or plastic adhesive protective material, layers of ibrous material affixed to the surfaces of the said metal article by said protective coating, and a surface coating of Ofrelatively high melting pointrfluxed with a suitable pitch applied to said fibrous layers. D In testimony whereof I have signed name to this specification.

HAROLD H. ROBERTSON.

a metal article provided with a' bituminous material 

